.
(20)
, , , .
, .
. . .
X | ||||
p | 0.2 | 0.3 | 0.1 | 0.4 |
:
6.1.2
1. .
2. .
3. .
.
4. .
.
: M(X) = 5, M(Y) = 2. Z, , , Z=2X + 3Y.
: M(Z) = M(2X + 3Y) = M(2X) + M(3Y) = 2M(X) + 3M(Y) = 2∙5+3∙2 =
1 2
= 10+6 = 16
1)
2)
n , . :
. () n .
(21)
6.1.3
. , .
. . , , , .
() .
(22)
, .. .
.
. .
|
|
(23)
. , () 2() , :
: .
. .
2 | ||||
0.2 | 0.3 | 0.1 | 0.4 |
: .
.
.
6.1.4
1. . .
2. , . .
3. . .
4. . .
. , , .
(24)
: 2- , , M(X) = 1,2.
. 6.1.2:
M(X) = np
M(X) = 1,2; n = 2. p:
1,2 = 2∙ p
p = 1,2/2
p = 0,6
q = 1 p = 1 0,6 = 0,4
:
D(X) = 2∙0,6∙0,4 = 0,48
6.1.5
.
(25)
. .
(26)
6.1.6
Mo (.. , )
Me , . , .
: :
X | ||||
p | 0.2 | 0.3 | 0.1 | 0.4 |
Mo = 9
Me = = 5,5
1. (, ).
2. .
3. .
4. .
1. .
2. .
3. .
4. .
6.4
1
1. , , , X, .
X | ||||
P | 0.1 | 0.6 | 0.2 | 0.1 |
2. Z, X Y: M()=6, M(Y)=4, Z=5X+3Y.
3. , , () = 1.
4. : x1 = 1, x2 = 2, x3 = 5, : , . , , , , , .
|
|
2
1. , X, .
X | ||||
P | 0.3 | 0.1 | 0.2 | 0.4 |
2. Z, X Y: M()=5, M(Y)=8, Z=6X+2Y.
3. , , () = 0,9.
4. : x1 = 1, x2 = 2, x3 = 4, x4 = 10, : , . , , , , , .
3
1. , X, .
X | ||||
P | 0.5 | 0.1 | 0.2 | 0.3 |
2. Z, X Y: M()=3, M(Y)=4, Z=4X+2Y.
3. , , () = 1,2.
4. : x1 = 0, x2 = 1, x3 = 2, x4 = 5, : , . , , , , , .
4
1. , X, .
X | ||||
P | 0.3 | 0.1 | 0.4 | 0.2 |
2. Z, X Y: M()=4, M(Y)=2, Z=5X+3Y.
3. , , () = 1,2.
4. : x1 = 1, x2 = 2, x3 = 4, x4 = 5, : , . , , , , , .
6.5 6
1. .
2. .
3. . .
4. .
5. .
6. .
7
: , , .
: , , , . .